New energy automobile charging cable
By combining a multi-layered protective structure with specific materials, the safety and service life issues of new energy vehicle charging cables in high-temperature and complex environments have been solved, achieving effective heat insulation, flame retardancy, and corrosion prevention.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU UNIV
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-14
AI Technical Summary
Existing charging cables for new energy vehicles are prone to overheating in high-temperature environments, lack effective heat insulation measures, and are insufficient in terms of flame retardancy and corrosion resistance, failing to meet the safety and service life requirements in complex environments.
It adopts a multi-layer protection structure, including an outer protective sheath, a cable core protective sheath, flame-retardant components, an anti-corrosion layer, and a buffer component. Materials such as aluminum hydroxide, polytetrafluoroethylene, and mica tape are used for flame retardancy, corrosion prevention, heat insulation, and buffering, respectively, to form multi-layer protection.
It effectively insulates against high temperatures, prevents cable core overheating, blocks the spread of fire, enhances corrosion resistance, significantly improves cable safety and durability, and adapts to complex operating environments.
Smart Images
Figure CN224123166U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of charging cable technology, and in particular to a charging cable for new energy vehicles. Background Technology
[0002] With the booming development of the new energy vehicle industry, the construction of charging infrastructure is crucial. As a key component connecting the power source and the vehicle, the performance of charging cables directly affects the safety and stability of the charging process, as well as the lifespan of the cables themselves. With the continuous increase in the power of new energy vehicles and the increasing complexity and diversity of charging scenarios, more stringent requirements are being placed on the performance of charging cables.
[0003] In existing technologies, most new energy vehicle charging cables use a simple insulation layer to wrap the cable core, with common insulation materials such as ordinary polyvinyl chloride (PVC). Their main technical principle is to prevent current leakage through the insulation layer, thus enabling power transmission. When facing external environmental factors, they typically rely solely on a single outer sheath to resist some physical damage. This outer sheath is often made of ordinary rubber or plastic, lacking specific protective designs for special environmental conditions.
[0004] Traditional charging cables are prone to overheating when the current is too high during charging or when used in high-temperature environments. The cable core inside is highly susceptible to overheating, and there are no reliable heat insulation measures to prevent heat accumulation. This can lead to dangerous situations such as insulation aging and short circuits. Furthermore, ordinary cables are inadequate in terms of flame retardancy and corrosion resistance. In the event of a fire, they lack an effective flame-retardant mechanism to slow the spread of the fire. In environments with a risk of chemical corrosion, such as near industrial pollution sources or the seaside, the outer sheath is insufficient to protect against corrosive substances, causing damage to the internal structure. This significantly reduces the safety and lifespan of the cables, making them unable to meet the growing charging demands of new energy vehicles. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a new energy vehicle charging cable, which aims to improve the problem that the cable core inside the traditional charging cable is prone to overheating, but there is no reliable heat insulation measure to prevent heat accumulation, which may lead to dangerous situations such as insulation aging and cable short circuit.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a new energy vehicle charging cable, comprising an outer protective sleeve, a cable core protective sleeve disposed inside the outer protective sleeve, a cable core body disposed inside the cable core protective sleeve, a flame-retardant component disposed inside the cable core protective sleeve, an anti-corrosion layer disposed inside the outer protective sleeve, and a wear-resistant coating uniformly coated on the outer wall of the outer protective sleeve.
[0007] The flame-retardant component includes a flame-retardant filler disposed between the cable core protective sleeve and the cable core body. The cable core protective sleeve has a heat-resistant layer inside and a flame-retardant coating uniformly applied to the outer wall of the cable core protective sleeve.
[0008] Furthermore, a protective sleeve is provided on the outer wall of the cable core protective sleeve, a buffer pad is provided between the protective sleeve and the cable core protective sleeve, an insulating layer is provided on the inner side of the cable core protective sleeve, and a protective component is provided between the protective sleeve and the outer protective sleeve.
[0009] Furthermore, the protective component includes an elastic element disposed between the outer protective sleeve and the protective sleeve, and the outer wall of the elastic element is provided with a rubber layer.
[0010] Furthermore, the elastic element is arranged in an arc shape, with its two ends fitting against the inner wall of the outer protective sleeve, and the arc-shaped surface fitting against the protective sleeve.
[0011] Furthermore, the rubber layer is disposed between the outer protective sleeve and the protective sleeve.
[0012] Furthermore, the flame-retardant filler is made of aluminum hydroxide to prevent the transfer of oxygen and heat.
[0013] Furthermore, the anti-corrosion layer is made of polytetrafluoroethylene (PTFE) to improve the water resistance and chemical corrosion resistance of the outer protective sleeve.
[0014] Furthermore, the heat-resistant layer is made of mica tape to improve the heat resistance of the cable core protective sheath.
[0015] This utility model has the following beneficial effects:
[0016] 1. In this utility model, the heat-resistant layer inside the cable core effectively insulates against high temperatures and prevents the cable core from overheating; the space between the cable core protective sleeve and the cable core body is filled with flame-retardant aluminum hydroxide filler, which decomposes upon heating, absorbs heat, and releases flame-retardant gas, blocking the transfer of oxygen and heat; at the same time, a flame-retardant coating is applied to the outer wall of the cable core protective sleeve to further delay the spread of fire; and the outer protective sleeve is provided with a polytetrafluoroethylene anti-corrosion layer, which has chemical corrosion resistance and waterproof performance, preventing external corrosive substances from eroding the internal structure, and significantly improving the safety and durability of the cable.
[0017] 2. In this utility model, a protective sleeve is fitted on the outer wall of the cable core protective sleeve, and a buffer pad is filled between the two to absorb vibration and local compression energy. An arc-shaped elastic element is set between the protective sleeve and the outer protective sleeve, with its two ends fitting against the inner wall of the outer protective sleeve and its arc surface tightly against the protective sleeve. The external pressure is dispersed through deformation. The elastic element is covered with a rubber layer to enhance the buffering effect and prevent friction damage to the components. When the cable is bent or impacted, the elastic element and the buffer pad deform together to form a double buffer, avoiding damage to the cable core body due to external force. This greatly improves the cable's resistance to pressure and impact, and adapts to complex usage environments. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of a new energy vehicle charging cable proposed in this utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of the outer protective sleeve of a new energy vehicle charging cable proposed in this utility model.
[0020] Figure 3 This is a schematic diagram of the internal structure of the cable core protective sleeve of a new energy vehicle charging cable proposed in this utility model.
[0021] Legend:
[0022] 1. Outer protective sleeve; 2. Cable core protective sleeve; 3. Cable core body; 4. Flame retardant filler; 5. Heat resistant layer; 6. Buffer pad filler; 7. Flame retardant coating; 8. Anti-corrosion layer; 9. Wear-resistant coating; 10. Insulation layer; 11. Protective sleeve; 12. Elastic element; 13. Rubber layer. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Reference Figures 1-3The present invention provides an embodiment of a new energy vehicle charging cable, including an outer protective sleeve 1, which is the outermost protective layer of the cable, resisting external physical damage and environmental influences. The outer protective sleeve 1 is provided with a cable core protective sleeve 2, which provides direct protection for the cable core body 3 and isolates external interference. The cable core body 3 is provided inside the cable core protective sleeve 2. Flame-retardant components are provided inside the cable core protective sleeve 2. The outer protective sleeve 1 is provided with an anti-corrosion layer 8, which is provided inside the outer protective sleeve 1. With the high chemical stability and water resistance of polytetrafluoroethylene, it resists corrosive substances such as acids, alkalis and salts. The outer wall of the outer protective sleeve 1 is uniformly coated with a wear-resistant coating 9.
[0025] The flame-retardant component includes a flame-retardant filler 4, which is made of aluminum hydroxide. When heated, it decomposes and absorbs heat, lowers the ambient temperature, releases flame-retardant gas to block the transfer of oxygen and heat, cuts off the conditions for combustion, and enhances the flame-retardant ability of the cable. The flame-retardant filler 4 is placed between the cable core protective sleeve 2 and the cable core body 3. The inside of the cable core protective sleeve 2 is provided with a heat-resistant layer 5, which is made of mica tape. It effectively isolates the high temperature of the outside and the heat generated by the cable core itself, prevents the cable core from degrading in performance or malfunctioning due to overheating, and maintains its stable operating environment. The outer wall of the cable core protective sleeve 2 is uniformly coated with a flame-retardant coating 7, which is an intumescent coating. When exposed to fire, the acid source causes the carbon source to dehydrate and carbonize, and the foaming agent produces gas, causing the coating to expand and form a carbonaceous foam layer, which effectively delays the spread of fire into the cable core protective sleeve 2.
[0026] Specifically, the cable core body 3 of the new energy vehicle charging cable is covered with a cable core protective sleeve 2. The heat-resistant layer 5 inside is made of mica tape, which can effectively insulate against high temperatures and prevent the cable core from overheating. The space between the cable core protective sleeve 2 and the cable core body 3 is filled with flame-retardant filler 4 made of aluminum hydroxide material. When heated, it decomposes, absorbs heat, and releases flame-retardant gas, blocking the transfer of oxygen and heat. The outer wall of the cable core protective sleeve 2 is coated with an intumescent flame-retardant coating 7, which expands when exposed to fire to form a carbonized foam layer, delaying the spread of fire. The polytetrafluoroethylene anti-corrosion layer 8 inside the outer protective sleeve 1 is resistant to chemical corrosion and waterproof, preventing external corrosive substances from eroding the internal structure and significantly improving the safety and durability of the cable.
[0027] Reference Figure 3The outer wall of the cable core protective sleeve 2 is provided with a protective sleeve 11. A buffer pad 6, made of EVA material, is provided between the protective sleeve 11 and the cable core protective sleeve 2. It is soft and highly elastic, and can efficiently absorb external vibration energy and local compression energy, preventing the cable core protective sleeve 2 from being damaged by impact. An insulation layer 10 is provided on the inner side of the cable core protective sleeve 2. A protective component is provided between the protective sleeve 11 and the outer protective sleeve 1. The protective component includes an elastic element 12, made of ethylene propylene rubber. Its two ends are attached to the inner wall of the outer protective sleeve 1, and its arc-shaped surface is attached to the protective sleeve 11. When subjected to external force, it uses elastic deformation to evenly distribute the external pressure. The elastic element 12 is located between the outer protective sleeve 1 and the protective sleeve 11. Between them, the outer wall of the elastic element 12 is provided with a rubber layer 13, which covers the elastic element 12 to enhance the buffering effect. At the same time, it uses its wear resistance and flexibility to prevent the elastic element 12 from being damaged by friction with surrounding components. The elastic element 12 is set in an arc shape, with its two ends fitting into the inner wall of the outer protective sleeve 1, and the arc surface fitting into the protective sleeve 11. The rubber layer 13 is set between the outer protective sleeve 1 and the protective sleeve 11. The flame retardant filler 4 is made of aluminum hydroxide to prevent oxygen and heat transfer. The anti-corrosion layer 8 is made of polytetrafluoroethylene to improve the water resistance and chemical corrosion resistance of the outer protective sleeve 1. The heat-resistant layer 5 is made of mica tape to improve the heat resistance of the cable core protective sleeve 2.
[0028] Specifically, the cable core protective sleeve 2 is provided with a protective sleeve 11, and the space between the two is filled with a buffer pad 6 made of EVA material, which can absorb vibration and local compression energy. The arc-shaped elastic element 12 between the protective sleeve 11 and the outer protective sleeve 1 has its two ends attached to the inner wall of the outer protective sleeve 1, and its arc surface is tightly attached to the protective sleeve 11. It is made of ethylene propylene rubber and can disperse external pressure through deformation. The elastic element 12 is covered with a rubber layer 13 of natural rubber to enhance buffering and prevent friction damage. When the cable is bent or impacted, the elastic element 12 and the buffer pad 6 deform together to form a double buffer, which prevents the cable core body 3 from being damaged by external force, greatly improves the cable's pressure resistance and impact resistance, and adapts to complex use environments.
[0029] Working principle: The cable core body 3 of the new energy vehicle charging cable is covered with a cable core protective sleeve 2. The inner side is provided with a heat-resistant layer 5, which can effectively isolate high temperature and prevent the cable core from overheating. The space between the cable core protective sleeve 2 and the cable core body 3 is filled with flame-retardant filler 4 made of aluminum hydroxide. When heated, it decomposes, absorbs heat and releases flame-retardant gas, blocking the transfer of oxygen and heat. In addition, the outer wall of the cable core protective sleeve 2 is coated with a flame-retardant coating 7, which further delays the spread of fire. The outer protective sleeve 1 is provided with a polytetrafluoroethylene anti-corrosion layer 8, which has both chemical corrosion resistance and waterproof performance, preventing external corrosive substances from eroding the internal structure. The above multi-layer flame-retardant and anti-corrosion design works together to significantly improve the safety and durability of the cable.
[0030] A protective sleeve 11 is fitted over the outer wall of the cable core protective sleeve 2, with a buffer pad 6 filling the space between them to absorb vibration and local compression energy. An arc-shaped elastic element 12 is provided between the protective sleeve 11 and the outer protective sleeve 1, with its two ends fitting against the inner wall of the outer protective sleeve 1 and its arc-shaped surface tightly against the protective sleeve 11. The external pressure is dispersed through deformation. The elastic element 12 is covered with a rubber layer 13 to enhance the buffering effect and prevent friction damage to the components. When the cable is bent or impacted, the elastic element 12 and the buffer pad 6 deform together to form a double buffer, preventing the cable core body 3 from being damaged by external forces. This design greatly improves the cable's resistance to pressure and impact, making it suitable for complex operating environments.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A charging cable for new energy vehicles, comprising an outer protective sleeve (1), characterized in that: The outer protective sleeve (1) is provided with a cable core protective sleeve (2) inside, the cable core protective sleeve (2) is provided with a cable core body (3) inside, the cable core protective sleeve (2) is provided with a flame retardant component inside, the outer protective sleeve (1) is provided with an anti-corrosion layer (8) inside, and the outer wall of the outer protective sleeve (1) is uniformly coated with a wear-resistant coating (9). The flame-retardant component includes a flame-retardant filler (4), which is disposed between the cable core protective sleeve (2) and the cable core body (3). The inside of the cable core protective sleeve (2) is provided with a heat-resistant layer (5), and the outer wall of the cable core protective sleeve (2) is uniformly coated with a flame-retardant coating (7).
2. The new energy vehicle charging cable according to claim 1, characterized in that: The outer wall of the cable core protective sleeve (2) is provided with a protective sleeve (11), and a buffer pad filling (6) is provided between the protective sleeve (11) and the cable core protective sleeve (2). An insulation layer (10) is provided on the inner side of the cable core protective sleeve (2), and a protective component is provided between the protective sleeve (11) and the outer protective sleeve (1).
3. The new energy vehicle charging cable according to claim 2, characterized in that: The protective component includes an elastic element (12), which is disposed between the outer protective sleeve (1) and the protective sleeve (11), and the outer wall of the elastic element (12) is provided with a rubber layer (13).
4. A new energy vehicle charging cable according to claim 3, characterized in that: The elastic element (12) is arranged in an arc shape, with its two ends fitting against the inner wall of the outer protective sleeve (1) and its arc surface fitting against the protective sleeve (11).
5. A new energy vehicle charging cable according to claim 3, characterized in that: The rubber layer (13) is disposed between the outer protective sleeve (1) and the protective sleeve (11).
6. A new energy vehicle charging cable according to claim 1, characterized in that: The flame-retardant filler (4) is made of aluminum hydroxide.
7. A new energy vehicle charging cable according to claim 1, characterized in that: The anti-corrosion layer (8) is made of polytetrafluoroethylene.
8. A new energy vehicle charging cable according to claim 1, characterized in that: The heat-resistant layer (5) is made of mica tape.